What’s New in Exchange 2007 #2 of 15: Exchange is 64-Bit Only
Posted by our Guest Blogger Peter Bruzzese, author of Tricks of the Windows Vista Masters.
When you first read that heading you might think, “What? That isn’t true at all! I have a 32-bit version of Exchange running on my server right now.” You would be correct. There is a 32-bit version, however only the 64-bit version of Exchange 2007 will be supported in a production environment…
The 32-bit is for functionality testing only. So in addition to the 64-bit version requiring us to have the hardware and software in place to install it, it also means we cannot perform an in-place upgrade of Exchange 2007 from Exchange 2000/2003 because these versions are only compatible with 32-bit Windows Server OS’s.
What is the benefit of 64-bit? x64 Windows Server operating systems allow Exchange to address larger amounts of virtual memory, enabling a much larger database cache. The direct impact of this is a significant reduction in disk I/O, allowing Exchange to scale up to support higher number of users using the same disk I/O capacity, and also allows Exchange to support newer features that add more business value.
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